import java.util.Arrays;
import java.util.Scanner;

public class NGuessNumber {
    public static int[] guesslist = new int[4];

    public static int[] numbers = new int[4];


    public static int a_num = 0;
    public static int b_num = 0;


    public static int[] generateAnswer() {

        int index = 0;

        while (true) {
            int random = (int) (Math.random() * 9 + 1);
            int j = 0;
            for (; j < numbers.length; j++) {
                if (random == numbers[j]) {
                    break;
                }
            }
            if (j == numbers.length) {
                numbers[index++] = random;
            }
            if (index == 4) {
                break;
            }
        }

        return numbers;
    }

    public static int[] getPlayerInput() {

        try {
            Scanner scanner = new Scanner(System.in);

            for (int i = 0; i < 4; i++) {
                System.out.print("第" + (i + 1) +
                        "个数字是");

                int wj = scanner.nextInt();
                if (wj >= 10 || wj < 0) {
                    System.out.println("请输入0-9之间的数字");
                    i = i - 1;
                } else {
                    guesslist[i] = wj;
                }
            }
        } catch (Exception e) {
            System.out.println("请输入的数字，此次机会作废");
        }

        System.out.println("猜测顺序为"+Arrays.toString(guesslist));
        return guesslist;
    }

    public static String compareGuessAnswer() {
        a_num = 0;
        b_num = 0;
        for (int i = 0; i < numbers.length; i++) {
            for (int l = 0; l < numbers.length; l++) {
                if (i != l) {
                    if (numbers[i] == guesslist[l]) {
                        b_num++;
                    }
                } else {
                    if (numbers[i] == guesslist[l]) {
                        a_num++;
                    }
                }
            }
        }
        System.out.println(a_num + "A" + b_num + "B");
        System.out.println("A表示存在且位置正确的数字个数，B表示存在且位置不正确的数字个数！");
        System.out.println("如：1A2B,表示你猜测的四个数字有3个是对的，有一个位置对，两个位置不对。\n");
        return a_num + "A" + b_num + "B\n" + "A表示存在且位置正确的数字个数，" + "B表示存在且位置不正确的数字个数！\n" + "如：1A2B," + "表示你猜测的四个数字有3个是对的，有一个位置对，两个位置不对。";
    }
    public static boolean isWin(){
        boolean result = false;
        if(a_num==4){
            result=true;
        }else {
            result=false;
        }
        return result;

    }
    public static void main(String[] args) {
        System.out.println("|--------------------新猜数字游戏---------------------|");
        while(true) {
            System.out.println("|---------------------输入1--------------------开始游戏|");
            System.out.println("|---------------------输入0--------------------结束游戏|");
            Scanner scanner = new Scanner(System.in);

            switch (scanner.nextInt()) {
                case 0:
                    System.out.println("--------已退出游戏--------\n");
                    System.exit(0);
                    break;
                case 1:
                    int cs = 0;
                    int changes = 7;

                    System.out.println("---------游戏开始(你有7次机会)-------");
                    generateAnswer();
                    while (true) {
                        getPlayerInput();
                        compareGuessAnswer();
                        if (isWin() == true) {
                            System.out.println("玩家获胜\n");
                            break;
                        } else {
                            cs++;
                            changes--;
                            if(cs==7){
                                System.out.println("7次机会使用完毕，正确答案为"+Arrays.toString(numbers));
                                System.out.println("|----------再来一局？-----------|");
                                break;
                            }
                            System.out.println("还剩"+changes+"次机会\n");
//                            System.out.println("答案是："+Arrays.toString(numbers));
                        }
                    }
                    break;
                default:
                    System.out.println("错误的输入字符，请输入0/1开始或者结束游戏\n");
            }
        }
    }
}
